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MATHEW T. GOSNELL, OF BALTIMORE, MARYLAND.

Letters Patent No. 70,7112, dated November 12, 1867. i

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TO ALL WHOM IT MAY CONCERNQI'.

Be it known that I, MATHEW T. vGrosNliLL, of the' city and county of Baltimore, in the State of Maryland, have invented a new and improved Mode and Apparatus for Heating and Generating Steam in Boilers; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had t'o the annexed drawings, making a part of this specification, in which- Figure 1 isa longitudinal elevation;

Figure 2, a transverse section.

Figure 3, a view of the front.

The nature of my invention (which is peculiarly adapted to marine engines) consists in so constructing the boilers and furnaces of the engine that I can withweoonomy employ benzine, gasoline, or ,any ofthose highlyvnporizable and highly-carbonizd products, instead of coal, and thus economize that space in the vessel hitherto occupied by the aforesaid coal. The importance of this substitution, and the perfect control of these products, and their combustion with atmospheric air, will readily be'appreciated by considering the pecuniary value of the space saved in the v'essel, as the tonnage hitherto devoted to coal can be appropriated to passengers or freight. I A

To enable others skilled in thelart to make and uselmy invention, I will describe the construction of the boiler, furnace, 85e., and the manner of controlling and consuming the material substituted for coal, 8vo. In the boiler A itself` there is ne peculiarity, but instead of the grate-bars of the furnace now in use, I employ perforated tubes B B, placed below a hearth, C, made of perforatcdporcelain, earthenware, or other suitable material to withstand the intense bent generated by the union of atmospheric air and any of the afore` said highly-charged carbonaceons Amaterial or products while the same are in a state of combustion. The gas eliminated from benzine or gasoline, if those materials are used, escapes from perforations of tubes B B, und passes through the perforated hearth C, and is there ignited. D represent valves, dempers, or theirequivalents, through which the atmosphere is admittcdrunder .the boiler and above the hearth. It adds materially and essentially to the evolution of an intense heat under the boiler without expense consequent from generating steam for engines hitherto employing' coal or wood. The furnace E, surrounding the boiler, is, as lfar as practicable, made air-tight by means readily suggested toen intelligent workman., The atmosphere "as admittedcosting nothing, and by my valve or inlets or shut-oit` arrangement, in conjunction with the aforesaid combination of tubes or pipes, perforated, as above stated, with the hearth and valves or inlets for the atmosphere, I am enabled by this combination to run an engine at less cost, more controllable, and as fully eiicient as any of the old appliances upto this invention. There is a valve in the chimney-stack, which may be used for controlling the draught. i

What I claim, therefore, is-

The combination and arrangement of a tube or pipes, B B, a perforated hearth, C, a v alve or valves or inlets, (for admission of atmospheric air,)'D D, with a boiler, A, and furnace, E, or their equivalents, in the manner` and for the purposes set forth.'

In testimony whereof I have hereunto signed my name before two subscribing witnesses.

M. T. GOSNELL.

Witnesses:

'JOHN F. CLARK, EDM. F. BROWN. 

